Guinness World Records吉尼斯世界紀錄
2020-04-06 04:29:36
閱讀(快樂英語高年級) 2020年12期
Scientists in the UK made the smallest Christmas card?in November 2010. The card is 200 micrometers（微米）wide?and 290 micrometers tall. Your hair is about 100 micrometers?wide.
